Matthews began working at ABC's Washington DC affiliate WJLA in 1976 as a production assistant. She worked her way up to producer and then she was a writer/reporter from 1982 to 1991. In 1991 she began anchoring. She was an anchor for 15 years through 2006 when she retired. She hosted and executive produced the nationally syndicated Working Womantelevision show from 2001 to 2006. She hosted political show Capital Sunday on Sundays. She was named a 2002 Washingtonian of the Year by Washingtonian magazine, and a "Woman Who Means Business" by the Washington Business Journal. She has also been awarded nine local Emmys and an Edward R. Murrow Award, among other top honors during her journalism career.
Corporate Communications
In July 2006 Matthews was named Executive Vice President – Global Communications and Public Affairs at Marriott, responsible for the company's external and internal communications, including global brand and corporate public relations, corporate social responsibility, and government affairs. She also co-chaired Marriott's Executive Green Council. In March 2015 she resigned from Marriott.
On June 3, 2015, Matthews officially announced that she was a Democratic Party candidate for Maryland's 8th congressional district, where incumbent Chris Van Hollen was relinquishing his House seat in order to run for the United States Senate. On March 16, 2016, the editorial board of The Washington Post endorsed Matthews, writing, "Our preference for Ms. Matthews boils down to our belief that in Congress, she would be more pragmatic and less doctrinaire than the left-leaning State SenatorJamie Raskin, whose passionate liberalism is unsurpassed in Annapolis. Both candidates supported gun control, clean energy, campaign finance reform and greater investment in education and health research. Ms. Matthews has greater potential, following the Van Hollen model, to move the ball forward in those areas." In contrast, Raskin enjoyed the endorsement of the Progressive Action PAC, the political arm of the Congressional Progressive Caucus, which grew from 72 members at the time of their December 2017 endorsement, to 92 members in early 2020. By April, 2016, the primary contest had drawn national attention as 2016's most expensive House race, dominated by Trone's deep pockets. Even without Trone's cash, the primary in Washington's prosperous Maryland suburbs became the nation's priciest, with total fundraising near the $20 million mark. Raskin and Matthews each collected about $2 million, not counting $500,000 in loans Matthews made to her campaign in March, 2016. On April 26, 2016, Matthews finished third among three frontrunners in the Democratic primary, behind Raskin, and businessman David Trone
Democratic politics
On March 1, 2017, Bruce Poole resigned as Chair of the Maryland Democratic Party, and on March 2, Matthews was chosen to be the interim Chair. On May 6, she was elected to a four-year term as state party Chair. Matthews promised to renew a state party infrastructure that has deteriorated in recent years, especially outside traditional Democratic strongholds in Baltimore City and Prince George's and Montgomery counties. She promised to pursue an “all-Maryland strategy” to recruit and support candidates. In December, 2018 she was replaced as Chair by Maya Rockeymoore Cummings.
